Re: Problem with a RAW Disk and Xen
On 8/27/20 3:49 AM, Christoph wrote:
Hi All,
I have in config of 2 Xen DomU's this disk:
<disk type='file' device='disk'>
<driver name='qemu' type='raw'/>
<source file='/dev/mapper/keys'/>
<target dev='xvdz' bus='xen'/>
<readonly/>
</disk>
Using blkback works for me, e.g. <driver name='phy'...>.
If I start the DomU's then all starts without problem, see this
in log
of the DomU:
{
"pdev_path": "/dev/mapper/keys",
"vdev": "xvdz",
"backend": "qdisk",
"format": "raw",
"removable": 1,
"discard_enable": "False",
"colo_enable": "False",
"colo_restore_enable": "False"
}
but this disk isn't there in the domU... Why?
It appears readonly disks only work with blkback.
It is a shared disk between the DomU's but configured as
"readonly" so
there shouldnt be a problem (with the same xen xl configuration, there
is no problem)
What xl config did you use? It doesn't work for me if I specify qdisk and
readonly. E.g. the following does not work
"backendtype=qdisk,format=raw,vdev=xvdz,access=ro,target=..."
Regards,
Jim